import  pymysql
class DB:
    def __init__(self):
        self.conn=pymysql.connect(host='localhost',port=3306,user='root',password='root',db='workf',charset='utf8'
        ,cursorclass = pymysql.cursors.DictCursor)
        self.cousor = self.conn.cursor()

#添加，修改，删除
def update(self,sql):
        self.cousor.execute(sql)
        self.conn.commit()
#查询单个
def find(self,sql):
    self.cousor.execute(sql)
    res = self.cousor.fetchone()
    return res
#查询所有
def find_all(self,sql):
    self.cousor.execute(sql)
    res = self.cousor.fetchall()
    return res
#关闭
def close(self):
    self.cousor.close()
    self.conn.close()
db1 = DB()